    class Student
    {
        public string First { get; set; }
        public string Last {get; set;}
        public int ID { get; set; }
        public string Street { get; set; }
        public string City { get; set; }
        public List<int> Scores;
    }

    class Teacher
    {
        public string First { get; set; }
        public string Last { get; set; }
        public int ID { get; set; } 
        public string City { get; set; }
    }